Pressed key structure with lighting module

Abstract

The present invention concerns to a press key structure with a light module in use of illuminant variation for arrow keys of an appliance. The press key structure with light module comprises a key base plate, a light source, a spread slice and a light guiding cap. The light guiding cap includes a crown part, a chamber, and a mouth part that is set on the key base plate and can exactly cover up the above light source. The spread slice is set in the chamber of the light guiding cap so that the light is evenly spread through the light guiding function of the spread slice. Moreover, by adjusting the thickness, transparency, and inside cambered surface of the spread slice, or the distance between the spread slice and the light source, the light guiding property thereof can be modulated.

1. A press key structure with light module, comprising:
 a key base plate; 
 a light source, mounted on said key base plate; 
 a light guiding cap containing a crown part, a chamber and a mouth part, and said mouth part of said light guiding cap is set on said key base plate and covers up said light source; and 
 a spread slice, set in said chamber of said light guiding cap; 
 wherein said key base plate is a Printed Circuit Board (PCB); and 
 wherein a set of arrow keys and multiple touch panel keys are set on said key base plate. 
 
   
   
     2. The press key structure with light module as claimed in  claim 1 , wherein said spread slice is made of translucent flexible material and can be fixed in said chamber. 
   
   
     3. The press key structure with light module as claimed in  claim 2 , wherein said spread slice is made of translucent silica gel. 
   
   
     4. The press key structure with light module as claimed in  claim 1 , wherein said crown part of said light guiding cap includes a light-entering surface and a light-exiting surface, and said spread slice is set in the chamber of said light guiding cap and is adhered to said light-entering surface of said light guiding cap. 
   
   
     5. The press key structure with light module as claimed in  claim 1 , wherein said light source is a tricolor LED (light emitting diode) lamp of red, green and blue colors. 
   
   
     6. The press key structure with light module as claimed in  claim 1 , which is in use of illuminant variation for the arrow keys.